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T-Beam

README.md

T-beam

  • Version: LILYGO® TTGO T-Beam V1.1
  • LoRa: Semtech SX1276
  • VCP Driver: CP2102
  • Board name in Arduino IDE: T-beam
  • Official GitHub: https://github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series
  • Install libraries: Move all sub-folders in LilyGo-LoRa-Series/libdeps to ~/Arduino/libraries

Pinout

LoRa_MISO_Pin = 19
LoRa_MOSI_Pin = 27
LoRa_SCK_Pin  =  5
LoRa_CS_Pin   = 18
LoRa_RST_Pin  = 23
LoRa_G0_Pin   = 26
SPI_CH        =  1

Difference between LoRa and LoRaWAN

  • LoRa is the Physical Layer protocol that supports Network Layer protocol LoRaWAN.
  • LoRa is about RF signal and LoRaWAN addresses MAC/Encryption.

Two libraries in LilyGo-LoRa-Series examples

  • Arduino LoRa is the library for LoRa operations.
  • RadioLib supports LoRa operations but intends to include LoRaWAN functions.

Play examples

  • Must uncomment board version and change LoRa_frequency in utilities.h
#define LILYGO_TBeam_V1_1
#define LoRa_frequency      915.0
  • GPS / OLED / SX1276_Tx are three minimalistic examples that demonstrate how to use different component on T-Beam board.
  • Tracker is the final project that report GPS info via LoRa protocol while display some info on screen.

Recv.py

  • Use LilyGo-LoRa-Series-master/examples/RadioLibExamples/SX1276/SX1276_Receive_Interrupt to program the receiver.
$ pip install pyserial
import serial, datetime
with serial.Serial(port='/dev/ttyUSB0',baudrate=115200) as s, open('tracker.log','w') as fw:
  while 1:
    print(datetime.datetime.now().strftime("%Y-%m-%dT%H:%M:%SZ"),' | ',s.readline().decode(), file=fw)
    fw.flush()


arduino-cli compile --fqbn esp32:esp32:t-beam $HOME/IoT-master/Espressif/ESP32/T-Beam/SX1276_Receive && arduino-cli upload  --fqbn esp32:esp32:t-beam -p /dev/ttyUSB2 $HOME/IoT-master/Espressif/ESP32/T-Beam/SX1276_Receive

arduino-cli compile --fqbn esp32:esp32:t-beam $HOME/IoT-master/Espressif/ESP32/T-Beam/SX1276_Transmit && arduino-cli upload  --fqbn esp32:esp32:t-beam -p /dev/ttyUSB1 $HOME/IoT-master/Espressif/ESP32/T-Beam/SX1276_Transmit